Abstract
In the Netherlands use is made of a mechanistic asphalt pavement design strategy. Asphalt stiffness and fatigue properties are important inputs for this design approach. In the Netherlands these properties are traditionally determined by 4 point bending tests (4pb).
In this paper the accuracy of that test is discussed on the basis of Finite Element modelling. It is shown that application of the EN-standard results in an underestimation of the stiffness by 3.2% (at 7500 MPa) and an underestimation of the phase lag by 0.4° (lag=20° and 20 Hz.). It is shown that a thorough analysis of the 4pb may reduce these errors to a stiffness that is underestimated by 0.88% and a phase lag which is overestimated by 0.1°.
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References
NEN-EN 12697-26, Bituminous mixtures – Test methods for hot mix asphalt – Part 26: Stiffness, European Committee for Standardisation, Brussels (July 2004)
NEN-EN 12697-24+A1, Bituminous mixtures – Test methods for hot mix asphalt – Part 24: Resistance to fatigue, European Committee for Standardisation, Brussels (July 2007)
Huurman, M., Pronk, A.C.: Theoretical analysis of the 4 point bending test. In: Proceedings of the 7th Int. RILEM Symposium Advanced Testing and Characterization of Bituminous Materials, Rhodes, Greece (May 2009)
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© 2012 RILEM 2012
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Huurman, M., Gelpke, R., Jacobs, M.M.J. (2012). A Theoretical Investigation into the 4 Point Bending Test. In: Scarpas, A., Kringos, N., Al-Qadi, I., A., L. (eds) 7th RILEM International Conference on Cracking in Pavements. RILEM Bookseries, vol 4. Springer, Dordrecht. https://doi.org/10.1007/978-94-007-4566-7_46
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DOI: https://doi.org/10.1007/978-94-007-4566-7_46
Publisher Name: Springer, Dordrecht
Print ISBN: 978-94-007-4565-0
Online ISBN: 978-94-007-4566-7
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